[roenxi]

The psychologists have given us the Big 5 model of personality which is a useful lens for interpreting LLM agreeability since it is literally an axis of the Big 5. Whether a model is agreeable or disagreeable is a personality choice that is independent of how correct the model itself is. There is no evidence I'm aware of that either end of the personality extreme is superior.

I doubt think a generic model can theoretically be tailored to please everyone. If it was disagreeable people would complain about that too - as a very disagreeable person I can vouch for the fact a lot of people don't like that. (But they're all wrong.)